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Thermoplastics pipes for the conveyance of fluids - Determination of the slow cracking resistance of pipes and fittings using the Notched Ring Test (NRT)
ISO/TS 16479:2012 determines the slow cracking resistance of pipes and fittings using the Notched Ring Test (NRT), which is a method for determining the slow crack resistance of thermoplastics resins and compounds in pipe form and/or finished products (e.g. pipes and fittings) from which a ring specimen can be cut and notched.
The test is performed under sustained constant loading in a test medium at a specified temperature and the time to the on-set of slow cracking is measured.
This method applies to the rings from pipes or fittings having a wall thickness greater than 5 mm.
ISO/TS 16479:2012 specifies the method of testing using notched ring specimens directly obtained from pipes or fittings.
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